"Window blinds & shades and shades are commonly used to control whether people can see into a room, or to manage sunlight. Blinds can come in a variety of types. The oldest style is the paper shade on a spring-loaded roller. More modern shades are often made from synthetic fibers that are stretched on a frame that can be controlled using a pull chain or rod. Venetian blinds can be positioned in a variety of ways – up, down;open, closed – using pull strings or rods. Vertical blinds are popular for patio doors and casement windows."